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Letteratura scientifica selezionata sul tema "Al-Mg-Si-Cu alloys"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 19 febbraio 2022

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Articoli di riviste sul tema "Al-Mg-Si-Cu alloys"

Tokuda, Momoko, Kenji Matsuda, Takeshi Nagai, Junya Nakamura, Tokimasa Kawabata e Susumu Ikeno. "TEM Observation of Cu and Ag Addition Al-Mg-Si Alloys". Advanced Materials Research 409 (novembre 2011): 81–83. http://dx.doi.org/10.4028/www.scientific.net/amr.409.81.

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It has been known that Cu-and Ag-addition Al-1.0mass%Mg2Si alloys (Al-Mg-Si-Cu alloy and Al-Mg-Si-Ag alloy) have higher hardness and elongation than those of Al-1.0mass%Mg2Si alloy. In this study, the aging behaviour of Al-Mg-Si-Cu alloy, Al-Mg-Si-Ag alloy and (Cu+Ag)-addition Al-1.0 mass% Mg2Si alloy (Al –Mg –Si-Cu-Ag alloy) has been investigated by hardness test and TEM observation. The Al-Mg-Si-Cu-Ag alloy has the fastest age-hardening rate in the early aging period and the finest microstructure at the peak hardness among three alloys. Therefore the microstructure of the precipitate in Al–Mg–Si-Cu-Ag alloy has been investigated by HRTEM observation to understand the effect of Cu and Ag addition on aging precipitation.

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Tokuda, M., K. Matsuda, T. Nagai, T. Kawabata, J. Nakamura e S. Ikeno. "Hrtem Observation of the Precipitates in Cu and Ag Added Al-Mg-Si Alloys". Archives of Metallurgy and Materials 58, n. 2 (1 giugno 2013): 363–64. http://dx.doi.org/10.2478/v10172-012-0200-7.

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It has been known that Cu- and Ag-added Al-1.0mass%Mg2Si alloys (Al-Mg-Si-Cu alloy and Al-Mg-Si-Ag alloy) have higher hardness and elongation than those of Al-1.0mass%Mg2Si alloy. In this study, the aging behaviour of Al-Mg-Si-Cu alloy, Al-Mg-Si-Ag alloy and (Cu+Ag)-addition Al -1.0 mass% Mg2Si alloy has been investigated by hardness test and TEM observation. The Al-Mg-Si-Cu-Ag alloy has the fastest age-hardening rate in the early aging period and the finest microstructure at the peak hardness among three alloys. Therefore the microstructure of the precipitate in Al-Mg-Si-Cu-Ag alloy has been investigated by HRTEM observation to understand the effect of Cu and Ag addition on aging precipitation.

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Zhao, Jing Rui, Yong Du, Li Jun Zhang, Shu Hong Liu, Jin Huan Xia e Jin Wei Wang. "Thermodynamic Calculation of the Liquidus Projections of the Al-Cu-Fe-Mg, Al-Cu-Mg-Si, and Al-Fe-Mg-Si Quaternary Systems on Al-Rich Corner". Materials Science Forum 993 (maggio 2020): 1031–42. http://dx.doi.org/10.4028/www.scientific.net/msf.993.1031.

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The thermodynamic calculations of Al-Cu-Fe-Mg, Al-Cu-Mg-Si and Al–Fe–Mg–Si quaternary systems were carried out using CALPHAD method, based on the Al–Cu–Fe–Mg–Si thermodynamic database. The liquidus projection of Al–Cu–Fe–Mg, Al–Cu–Mg–Si and Al–Fe–Mg–Si quaternary systems at Al-rich corner were constructed, and the solidification structures of Al-12Cu-7Mg-1Fe, Al-14Cu-2Mg-4Si, Al-0.3Fe-6Mg-12Si (wt.%) alloys were analyzed by the Scheil solidification simulation. The calculated results agree well with the previous experimental data. The liquidus projections of three quaternary aluminum alloys at the Al-rich corner were accurately plotted, which could be helpful for the analysis of solidification process of multicomponent alloy systems, and provide an important theoretical basis for the material design of aluminum alloys.

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Kovacheva, R. "Metallographic Investigation of Al-Si-Mg and Al-Si-Cu Alloys/ Metallographische Untersuchung von Al-Si-Mg- und Al-Si-Cu- Legierungen". Practical Metallography 30, n. 2 (1 febbraio 1993): 68–81. http://dx.doi.org/10.1515/pm-1993-300203.

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Lech-Grega, Marzena, e Sonia Boczkal. "Iron Phases in Model Al-Mg-Si-Cu Alloys". Materials Science Forum 674 (febbraio 2011): 135–40. http://dx.doi.org/10.4028/www.scientific.net/msf.674.135.

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Iron phases present in alloys from the 6xxx series affect the workability behaviour of these alloys. Iron in these alloys occurs in the form of intermetallic phases and AlFe, α-AlFeSi, β- AlFeSi eutectics. The homogenisation treatment is carried out to induce the transformation of  phase into phase The aim of the studies was EDX and EBSD analysis by scanning microscopy of iron phases present in model alloys based on 6061 system, characterised by the silicon-iron ratio Si/Fe=0,5 and 1, examined in as-cast condition and after homogenisation, followed by a comparison of the detected phases with phases present in industrial ingots. In 6061 alloy, copper in the amount of 0,4wt.% occurred in the solid solution of aluminium. The EDX analysis proved that copper atoms were embedded also in iron precipitates, and scarce phases of an AlxCuy type were being formed. Different content of magnesium in the examined alloys (0,8 and 1,2wt.%) affected not only the quantitative content of Mg2Si phases, but also the presence of AlFe phases in alloy with small content of Si (0,4wt.%) and high content of Mg (1,2wt.%).

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Ber, L. B. "Accelerated artificial ageing regimes of commercial aluminium alloys. II: Al–Cu, Al–Zn–Mg–(Cu), Al–Mg–Si–(Cu) alloys". Materials Science and Engineering: A 280, n. 1 (marzo 2000): 91–96. http://dx.doi.org/10.1016/s0921-5093(99)00661-9.

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Lacaze, Jacques, Gérard Lesoult e Ibrahim Ansara. "Rosettes in Al-Cu-Mg-Si Aluminium Alloys". Materials Science Forum 217-222 (maggio 1996): 171–76. http://dx.doi.org/10.4028/www.scientific.net/msf.217-222.171.

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Chakrabarti, D. J., e J. L. Murray. "Eutectic Melting in Al-Cu-Mg-Si Alloys". Materials Science Forum 217-222 (maggio 1996): 177–82. http://dx.doi.org/10.4028/www.scientific.net/msf.217-222.177.

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Yao, Ji Yong, Geoffrey A. Edwards, Li-Hui Zheng e D. A. Graham. "Directional Solidification of Al-Si-Cu-Mg Alloys". Materials Science Forum 217-222 (maggio 1996): 183–88. http://dx.doi.org/10.4028/www.scientific.net/msf.217-222.183.

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Kim, A., S. S. Cho e H. J. Lee. "Foaming behaviour of Al–Si–Cu–Mg alloys". Materials Science and Technology 20, n. 12 (dicembre 2004): 1615–20. http://dx.doi.org/10.1179/026708304x11297.

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Tesi sul tema "Al-Mg-Si-Cu alloys"

Buha, Joka School of Materials Science &amp engineering UNSW. "Interrupted ageing of Al-Mg-Si-Cu alloys". Awarded by:University of New South Wales. School of Materials Science and engineering, 2005. http://handle.unsw.edu.au/1959.4/20794.

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This thesis systematically investigates the effects of a recently developed modified ageing procedure of aluminium alloys, termed the T6I6 temper, on the microstructural development and mechanical properties of the Al ??? Mg ??? Si - Cu alloy 6061. For the T6I6 temper, a conventional single stage T6 temper is interrupted by an ageing period at a reduced temperature (65??C) to facilitate secondary precipitation, before resuming the final ageing at the temperature of the initial T6 treatment. The T6I6 temper was found to cause simultaneous increases in tensile properties, hardness, and toughness as compared with 6061 T6. Al ??? Mg ??? Si ??? Cu alloys are medium strength alloys widely used in the automotive industry and their further improvement is underpinned by stringent demands for weight reduction placed on the transportation industry in recent years. The potential for further improvement of the mechanical properties was found in the control of secondary precipitation that may take place even in some fully aged alloys when exposed to reduced temperatures. The overall improvement in the mechanical properties of 6061 T6I6 was attributed to the formation of finer and more densely dispersed precipitates in the final microstructure. The refinement of precipitates was facilitated by control of the precipitation processes and gradual evolution of the microstructure throughout each stage of the T6I6 treatment. The results indicated that the concentration and the chemical environment of the vacancies controlled the precipitation processes in this alloy. Findings also show that the proportion of the different precipitate phases present in the final microstructure, as well as the amount of the solute in these precipitates, can be controlled and modified utilizing secondary precipitation. A number of analytical techniques were used in this study. The evolution of the microstructure was studied using Transmission Electron Microscopy (TEM), High Resolution TEM (HRTEM) and Three Dimensional Atom Probe (3DAP). Vacancy-solute interactions were studied using Positron Annihilation Lifetime Spectroscopy (PALS) and 3DAP. The distribution of the solute was studied using 3DAP and Nuclear Magnetic Resonance (NMR). Differential Scanning Calorimetry (DSC) was used to identify precipitation reactions and to determine the stability of vacancy-associated aggregates.

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Sjölander, Emma. "Heat treatment of Al-Si-Cu-Mg casting alloys". Doctoral thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Material och tillverkning – Gjutning, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-15695.

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Environmental savings can be made by increasing the use of aluminium alloys in the automotive industry as the vehicles can be made lighter. Increasing the knowledge about the heat treatment process is one task in the direction towards this goal. The aim of this work is to investigate and model the heat treatment process for Al-Si casting alloys. Three alloys containing Mg and/or Cu were cast using the gradient solidification technique to achieve three different coarsenesses of the microstructure and a low amount of defects. Solution treatment was studied by measuring the concentration of Mg, Cu and Si in the α-Al matrix using wavelength dispersive spectroscopy (WDS) after various times at a solution treatment temperature. A diffusion based model was developed which estimates the time needed to obtain a high and homogenous concentration of alloying elements for different alloys, temperatures and coarsenesses of the microstructure. It was shown that the yield strength after artificial ageing is weakly dependent on the coarseness of the microstructure when the solution treatment time is adjusted to achieve complete dissolution and homogenisation. The shape and position of ageing curves (yield strength versus ageing time) was investigated empirically in this work and by studying the literature in order to differentiate the mechanisms involved. A diffusion based model for prediction of the yield strength after different ageing times was developed for Al-Si-Mg alloys. The model was validated using data available in the literature. For Al-Si-Cu-Mg alloys further studies regarding the mechanisms involved need to be performed. Changes in the microstructure during a heat treatment process influence the plastic deformation behaviour. The Hollomon equation describes the plastic deformation of alloys containing shearable precipitates well, while the Ludwigson equation is needed when a supersaturated solid solution is present. When non-coherent precipitates are present, none of the equations describe the plastic deformation well. The evolution of the storage rate and recovery rate of dislocations was studied and coupled to the evolution of the microstructure using the Kocks-Mecking strain hardening theory.

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Kent, Damon. "Age hardening of sintered Al-Cu-Mg-Si-Sn alloys /". St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17893.pdf.

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Thieme, Michael, Frank Bergner, Ingrid Haase e Hartmut Worch. "Comparative Investigations to Corrosion Fatigue of Al-Cu and Al-Mg-Si Alloys". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-107075.

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One of the serious problems encountered in the use of various materials in technology is the occurrence of fatigue phenomena as an undesirable material damage under cyclic mechanical load. For aluminium alloys this issue is of extremely high importance in case of their utilisation for aircraft purposes, e.g., where a very wide spectrum of frequencies occur. Moreover, the cyclic loading may be joined by the presence of specific electrolyte media. Therefore, the material candidates must be thoroughly examined in view of their sensitivity to fatigue as well as to corrosion fatigue. Usually, the Cu-containing alloy EN-AW 2024 T3 is applied besides 7075 T6 in Airbus aircrafts, but the weldable alloy 6013 T6 is considered to be a potential alternative. Referring to former investigations on the environmental sensitivity (ES) in the fatigue behaviour /1-6/ this paper brings up experimental findings as well as expanded considerations about damaging mechanisms and modelling. The situation with the alloy 6013 T6 is emphasized. The propagation of cracks under cyclic load in different environments, such as vacuum, air or aqueous media, is described by means of fracture mechanics. This enables discrimination in view of the influence of environmental factors and, hence, the participation of corrosion processes.

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Thieme, Michael, Frank Bergner, Ingrid Haase e Hartmut Worch. "Comparative Investigations to Corrosion Fatigue of Al-Cu and Al-Mg-Si Alloys". Technische Universität Dresden, 2004. https://tud.qucosa.de/id/qucosa%3A26715.

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Benati, Davi Munhoz 1981. "Avaliação da tixoconformabilidade de ligas Al-Xwt%Si-2,5wt%Cu-0,5wt%Mg". [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264018.

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Orientador: Eugenio Jose Zoqui
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-11T16:09:14Z (GMT). No. of bitstreams: 1 Benati_DaviMunhoz_M.pdf: 9368625 bytes, checksum: 4c58a987840759e499c7fd1c0db0d7f6 (MD5) Previous issue date: 2008
Resumo: Este trabalho teve co:mo objetivo avaliar a tixoconformabilidade de ligas Al-Xwt%Si2,5wt%Cu-0,5wt%Mg, abrangendo desde a obtenção das ligas tixofundidas até sua completa caracterização em termos de macro e microestrutura e comportamento viscoso. Ligas Al-1,Owt%Si-2,5wt%Cu-0,5wt%Mg, Al-2,Owt%Si-2,5wt%Cu-0,5wt%Mg, Al-4,Owt%Si2,5wt%Cu-0,5wt%Mg e Al-7,Owt%Si-2,5wt%Cu-0,5wt%Mg foram produzidas via ultra-refino de grãos utilizando o refinador Al-5,Owt%Ti-l,Owt%B. Os materiais foram submetidos a tratamentos térmicos de reaquecimento pelos.tempos de Os, 30s, 90s e 21Os, para duas condições de frações sólidas, 45% e 60%. As ligas contendo 1,Owt%Si, 2,Owt%Si e 4,Owt%Si mostraram-se. bastante próximas em termos de viscosidade aparente, no entanto, a liga com 4,Owt%Si apresentou melhor desempenho em termos de globularização, expressa pelo RQI. Já a liga contendo 7,Owt%Si mostrou-se dendrítica para todas as condições estudadas, o que dificulta sua aplicação nos processos de tixoconformação Os tempos de tratamento térmico agem no sentido de promover a globularização das partículas de fase primária, de forma que os melhores resultados de viscosidade foram alcançados para ligas submetidas aos tempos de 21 Os. As frações sólidas de 45% e 60% não apresentaram diferenças significativas em termos de RQI, porém as ligas contendo menor fração sólida apresentaram melhor desempenho em termos de viscosidade aparente, da ordem de 105Pa.s
Abstract: The goal of this work was to evaluate the thixoformability of Al-Xwt%Si-2.5wt%CuO.5wt%Mg alIoys, including the thixocasting of all alloys and their complete characterization in terms of macro and microstructures and rheological behavior. Al-l.0wt%Si-2.5wt%CuO.5wt%Mg, Al-2.0wt%Si-2.5wt%Cu-0.5wt%Mg, Al-4.0wt%Si-2.5wt%Cu-0.5wt%Mg and Al-7.0wt%Si-2.5wt%Cu-0.5wt%Mg alloys were produced by ultra-refining by addiction of Al5.0wt%Ti-1.0wt%B master alIoy. The materials were submitted to re-heating treatment for Os, 30s, 90s and 2l0s in two conditions, 45% al!d 60% of solid fraction. 1.0wt%Si, 2.0wt%Si and 4.0wt%Si alloys showed very similar results for apparent viscosity, however the 4.0wt%Si alloy showed better performance in terms of globularization, measured by RQI. Thixocast 7.0wt%Si alloy presented dendrictic structures for alI conditions analyzed, making its application too difficult for thixoforming processes. Re-heating treatment times promote the solid phase particles globularization, so that the alloys treated during 210s achieved better results for apparent viscosity. Both 45% and 60% solid fractions did not show significant differences in terms of RQI, but the alloys containing lower solid fraction showed better performance for apparent viscosity, in the order of 105Pa.s
Mestrado
Materiais e Processos de Fabricação
Mestre em Engenharia Mecânica

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Zhang, Duyao. "Thermodynamic characterisation of semi-solid processability in alloys based on Al-Si, Al-Cu and Al-Mg binary systems". Thesis, University of Leicester, 2015. http://hdl.handle.net/2381/32538.

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The processing window is important for the semisolid processability of alloys. Applications of semi-solid metal (SSM) processing, especially aluminium alloys have been expanding for their excellent mechanical properties. However, the alloys well suited and commercially used for SSM processing today are limited in types. The main purpose of this Ph.D. project is to understand what makes an alloy suitable for SSM processing on both aspects of thermodynamics and kinetics. This research started with a fundamental study of binary alloys based on Al-Si, Al-Cu and Al-Mg systems (wt%): Al-1Si, Al-5Si, Al-12Si and Al-17Si; Al-1Cu, Al-2Cu and Al-5Cu; Al-0.5Mg, Al-3Mg and Al-5.5Mg. These are representative of Si, Cu and Mg contents in commercial alloys used for SSM processing. The Single-Pan Scanning Calorimeter (SPSC) and Differential Scanning Calorimeter (DSC) were used to investigate the liquid fraction changes during heating and cooling of these binary alloys. Thermo-Calc and DICTRA (DIffusion-Controlled TRAnsformations) software have been used to predict the fraction liquid versus temperature taking into account both thermodynamics and kinetics. Comparison of the predictions with experimental data revealed that the simulation results show the same pattern with experimental results in the fraction liquid-temperature relationship. However, the SPSC results are closer to the prediction than DSC curves are, even with the relatively large sample size associated with SPSC. This is potentially a significant result as predicting the liquid fraction versus temperature for the heating of a billet for semi-solid processing remains one of the challenges. The results also suggest that the fraction liquid sensitivity to time should be identified as a critical parameter of the process window for semi-solid processing in addition to the fraction liquid sensitivity to temperature. For microstructure investigation, microanalysis techniques, including Scanning Electron Microscopy (SEM) and micro-indentation testing, have been used on polished sections, and compared to theoretical predictions. In addition, some parts of this project are in cooperation with General Research Institute for Nonferrous Metals (GRINM), which aims to design and develop high performance semi-solid alloys. Thermodynamic analysis (both predictions and experiments) were carried out on thixoformed 319s (2.95Cu, 6.10Si, 0.37Mg, wt%) and 201 (4.80Cu, 0.7Ag, wt%) aluminium alloys. SEM techniques and Transmission Electron Microscopy (TEM) were used for the microstructural characterisation. The results showed that the DSC curves were sensitive to microsegregation in SSM alloys and resulted in a lower liquid fraction than the cast alloys calculated through the integration method from the DSC results. Al2Cu phase in SSM alloys 319s and 201 can be dissolved into matrix up to 0.4 % before melting temperature under 3K/min heating rate when compared with 10K/min heating rate. The DSC scan rate should be carefully selected as higher heating rate can inhibit dissolution of the intermetallic phases during heating leading to less accurate liquid fractions predictions.

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Zandbergen, Mathijs Willem. "Study of early-stage precipitation in Al-Mg-Si(-Cu) alloys by 3D atom probe". Thesis, University of Oxford, 2008. http://ora.ox.ac.uk/objects/uuid:ae2ab6c5-6e0a-4a3c-902b-d05596e5f4a3.

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Hardness measurements and Three-Dimensional Atom Probe (3DAP) were used to characterize the early stages of precipitation in three different Al-Mg-Si alloys (Al-0.50 wt%Mg-1.00 wt%Si) with different Cu contents (0.03 wt%, 0.15 wt%, or 0.80 wt% Cu). Heat treatments were chosen to simulate an industrial production line for car body-sheet material and included natural ageing (NA), pre-ageing at 80 °C (PA), paint-bake ageing at 180 °C (PB) and 10 second ageing at 180 °C (spike). The Cu content and the chosen heat treatments were found to influence the microstructural evolution of the alloy considerably. Based on the determined microstructures and matrix solute concentrations, mechanisms for the effect of NA, PA and Cu additions were proposed. NA had a deleterious effect on the PB hardening response, which was delayed dramatically after 20 minutes NA or longer. When the NA time was 1 minute, β" precipitates were formed within 30 minutes PB resulting in high hardness of the alloy. The delay with NA time was caused by a decrease in the nucleation rate of elongated precipitates during the subsequent PB. This decrease was thought to be due to a combination of a decrease in the matrix solute concentrations and clusters acting as vacancy sinks. PA before NA improved the PB response due to the formation of a high density of short elongated precipitates. Small Mg-Si clusters were detected after both NA and PA. Clusters formed during PA were found to be, on average, Mg-richer and larger than those formed during NA. Larger clusters were found to be more stable during PB and, upon PB, to grow into nucleation sites for elongated precipitates. Application of a spike before PA resulted in faster growth of clusters during PA. Growth of clusters and nucleation of short elongated precipitates during PB was found to be enhanced with increasing Cu content when no PA was given. Cu was found to be present in all precipitates and clusters in the alloy with the highest Cu content. These precipitates were thought to be precursors to the Q' phase.

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De, la Sablonnière Hugo. "Effet du titre en magnésium sur les propriétés de l'alliage d'aluminium 319 (Al-Si-Cu-Mg) /". Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1996. http://theses.uqac.ca.

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Dinnis, Cameron. "Porosity formation in unmodified Al-Si-Mg-(Cu) foundry alloys : the role of iron and manganese /". [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18550.pdf.

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Libri sul tema "Al-Mg-Si-Cu alloys"

Huang, Ze Wen. Study of the ageing behaviour of Al-Mg-Si 6061 and Al-Zn-Mg-Cu 7075 alloys with and without lithium additions. Birmingham: University of Birmingham, 1991.

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Capitoli di libri sul tema "Al-Mg-Si-Cu alloys"

Tokuda, M., K. Matsuda, T. Nagai, T. Kawabata, J. Nakamura e S. Ikeno. "HRTEM Observation of Precipitation in Cu and Ag Added Al-Mg-Si Alloys". In ICAA13: 13th International Conference on Aluminum Alloys, 1262–66. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch192.

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Miao, W. F., e D. E. Laughlin. "The Effect of Pre-Aging on Artificial Aging Response in Al-Mg-Si-Cu Alloy 6111". In Automotive Alloys 1999, 223–38. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118787601.ch19.

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Bjørge, Ruben, Sigmund J. Andersen, Calin D. Marioara, Joanne Etheridge e Randi Holmestad. "Aberration-Corrected STEM Study of Precipitates in an Al-Mg-Si-Ge-Cu Alloy". In ICAA13: 13th International Conference on Aluminum Alloys, 3–8. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch1.

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Oe, Yoshihisa, Kenji Matsuda, Momoko Tokuda, Takeshi Nagai, Tokimasa Kawabata e Susumu Ikeno. "Effect of Cu or Ag Addition on Two-Step Aging Al-Mg-Si Alloy". In ICAA13: 13th International Conference on Aluminum Alloys, 1267–70. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch193.

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Pogatscher, Stefan, Helmut Antrekowitsch, Marion Werinos, Gunther Rank, Anna Kais, Ramona Prillhofer, Jorg F. Loffler e Peter J. Uggowitzer. "Statistical and Thermodynamic Optimization of Trace-Element Modified Al-Mg-Si-Cu Alloys". In Light Metals 2015, 263–70. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093435.ch45.

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Hida, Shintaro, Momoko Tokuda, Kastumi Watanabe, Kenji Matsuda e Ikeno Susumu. "Observation of Equilibrium Phase for Cu or Ag Addition Al-Mg-Si Alloys". In Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing, 1329–34. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-48764-9_166.

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Hida, Shintaro, Momoko Tokuda, Kastumi Watanabe, Kenji Matsuda e Ikeno Susumu. "Observation of Equilibrium Phase for Cu or Ag Addition Al-Mg-Si Alloys". In PRICM, 1329–34. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118792148.ch166.

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Pogatscher, Stefan, Helmut Antrekowitsch, Marion Werinos, Gunther Rank, Anna Kaiß, Ramona Prillhofer, Jörg F. Löffler e Peter J. Uggowitzer. "Statistical and Thermodynamic Optimization of Trace-Element Modified Al-Mg-Si-Cu Alloys". In Light Metals 2015, 265–70. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48248-4_45.

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Liang, Zeqin, Cynthia Sin Ting Chang, John Banhart e Jürgen Hirsch. "The Effect of Cu and Cr on Clustering and Precipitation in Al-Mg-Si Alloys". In ICAA13: 13th International Conference on Aluminum Alloys, 1125–30. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch169.

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Han, Yi, Ke Ma, Chuyan Wang e Hiromi Nagaumi. "Precipitation Behavior of Dispersoids in Al-Mg-Si-Cu-Mn-Cr Alloy during Homogenization Annealing". In ICAA13: 13th International Conference on Aluminum Alloys, 1817–24. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch272.

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Atti di convegni sul tema "Al-Mg-Si-Cu alloys"

Klos, Artur, Sven Kellner, Daniel Wortberg, Philipp Walter, Corrado Bassi e Marion Merklein. "Forming characteristics of artificial aging Al-Mg-Si-Cu sheet alloys". In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF GLOBAL NETWORK FOR INNOVATIVE TECHNOLOGY AND AWAM INTERNATIONAL CONFERENCE IN CIVIL ENGINEERING (IGNITE-AICCE’17): Sustainable Technology And Practice For Infrastructure and Community Resilience. Author(s), 2017. http://dx.doi.org/10.1063/1.5007977.

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Cojocaru, O., W. Lefebvre, C. D. Marioara, H. K. Hasting, J. Walmsley e F. Danoix. "Study of Copper Effect on the Early Stage of Precipitation in Al-Mg-Si-Cu Alloys". In 2006 19th International Vacuum Nanoelectronics Conference. IEEE, 2006. http://dx.doi.org/10.1109/ivnc.2006.335330.

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Patel, Dhruv, Chintan Davda, P. S. Solanki e M. J. Keshvani. "Effect of T6 heat treatment on the microstructural and mechanical properties of Al–Si–Cu–Mg alloys". In INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2015): Proceeding of International Conference on Condensed Matter and Applied Physics. Author(s), 2016. http://dx.doi.org/10.1063/1.4946715.

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Li, Zhuoqun, e Xin Wu. "Inner Surface Cracking of an Aluminum Alloy in Small-Radius Bending". In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42976.

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Abstract (sommario):

Aluminum alloys, due to their low density, high strength to weight ratio and formability, are widely used in automotive components. At present, most of the sheet alloy being used is AA6111; an Al-Mg-Si alloy with addition of Cu. AA6111. These alloys contain micrometer sized inclusions and second phase particles, with good combination of strength and formability [1]. However, at the same time, the formability of AA6111 is also limited because of these micro-sized inclusions and second phase particles [2]. To improve the formability of sheet metal used as automotive body such as panels, a newer alloy AA6022 containing nano-sized strengthening precipitates and enhanced formability has been developed. A number of research works have been done on the precipitation sequences and phase development during aging of these alloys. Recently Miao and Laughlin have reported that the precipitation sequence in the AA6022 is in the following reaction: solid solution α → GP zones → β″ → β′ + lath-like precipitate ← β + Si [3, 4]. As to AA6111, the sequence of precipitation is believed to initiate with the metastable phases, β″ and β′ leading to the equilibrium β phase. The structure and composition of the β phase have been well established to be of the fluorite structure with a composition Mg2Si [5–7]. Recent works also report the presence of a quaternary phase, Q and its metastable precursor, Q′ in the precipitation sequence [8]. The aim of this report is to find the relationship between the microstructure and the failure of the hole expanded and small angle bended samples. We will report a finding of inner surface fracture during small-radius bending due to the tensile residual stress development in the inner surface.

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Shivamurthy, R. C., e M. K. Surappa. "Characteristics of Tribolayers Observed in A356 Al Alloy — SiCP Composite Discs/Brake Pad During Sliding Wear Tests". In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64040.

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Tribological characteristics of A356 Al alloy-10 vol. % SiCP composite discs/brake pad has been studied under dry sliding conditions at sliding speeds in the range 2 to 5 m/s and at loads in the range 1–3 MPa. In these tests, disc of Al MMCs and pin of friction pad made of polymer based composite were used. Wear rates of Al MMC disc as calculated by weight loss method, found to be negative at high sliding speed and high load. Worn surface of disc has been analyzed using EDAX. SEM analyses of worn surfaces of composite disc infer transfer of material from pin to the disc resulting in the formation of tribolayers. Two types of tribolayers were observed on the worn surface, one having shiny appearance of copper rich layer and other is dark in colour consisting of Mg, S, Fe, Ba, Ca, Si, Cu, In and Al. In the later layers were rich in copper and appear as bright patchy layers under SEM. Coverage of copper rich layers increase all along and across the worn track at a sliding speed of 4 and 5 m/s in the load range 2 to 3 MPa. Atomic percent of copper increase with load and consequently affect the wear rate of disc. EDAX analysis of dark tribo layers on wear track of composite disc show continuous increase in the amount of Cu and Ba with increase in speed and load. Hence, wear rate of composite discs were relatively low under all test conditions. These results clearly indicate composition of friction material having profound influence on the wear rate of Al MMC discs.

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SEABRA MELO, BEATRIZ, Vinicius Silva, Andrey Coelho das Neves, Gustavo Rebelo, Carlos Vinícius de Paes Santos, Marielle Vital e JOSÉ MARIA DO VALE QUARESMA. "EVALUATION OF THE ELECTRICAL AND MECHANICAL PROPERTIES OF ALLOY AL-0.25%CU-0.7%SI-1.0%MG-0.2%FE FOR DETERMINATION OF TERMORRESISTIVITY". In 25th International Congress of Mechanical Engineering. ABCM, 2019. http://dx.doi.org/10.26678/abcm.cobem2019.cob2019-1983.

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